错误:信号11 (SIGSEGV)，代码1

Question

我正在调用C++函数，给出了以下错误：signal 11 (SIGSEGV), code 1崩溃转储是：

Build fingerprint: 'google/hammerhead/hammerhead:6.0/MRA58K/2256973:user/release-keys'
pid: 19580, tid: 19706, name: Thread-6405  >>> com.adhamenaya <<<
signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0xfa0
Stack frame 10-21 19:25:04.423   200   200 F DEBUG   :     #00 pc 0041c59e  /data/app/com.adhamenaya-2/lib/arm/libGrafty.so (cv::Mat::copyTo(cv::_Outp
utArray const&) const+173): Routine cv::Mat::copyTo(cv::_OutputArray const&) const at ??:?
Stack frame 10-21 19:25:04.423   200   200 F DEBUG   :     #01 pc 0023b034  /data/app/com.adhamenaya-2/lib/arm/libGrafty.so (cv::Mat::clone() const+56
): Routine cv::Mat::clone() const at D:/scryptech/ndk_project/OpenCV-android-sdk/sdk/native/jni/include/opencv2/core/mat.inl.hpp:628 (discriminator 1)

Stack frame 10-21 19:25:04.423   200   200 F DEBUG   :     #02 pc 0023b3a4  /data/app/com.adhamenaya-2/lib/arm/libGrafty.so (GraftySystem::setCurrentF
rame(cv::Mat&)+44): Routine GraftySystem::setCurrentFrame(cv::Mat&) at C:\Users\aenaya\git\GraftyAndroid\GraftyAndroid/jni/grafty-system-settings.cpp:
39
Stack frame 10-21 19:25:04.423   200   200 F DEBUG   :     #03 pc 002b339c  /data/app/com.adhamenaya-2/lib/arm/libGrafty.so (Java_com_adhamenaya_Nativ
e_runGrafty+492): Routine Java_com_adhamenaya_Native_runGrafty at C:\Users\aenaya\git\GraftyAndroid\GraftyAndroid/jni/grafty-hr-main.cpp:96 (discrimin
ator 1)
Stack frame 10-21 19:25:04.423   200   200 F DEBUG   :     #04 pc 0036a627  /data/app/com.adhamenaya-2/oat/arm/base.odex (offset 0x29c000) (byte[] com
.adhamenaya.Native.runGrafty(java.lang.String, java.lang.String, java.lang.String, java.lang.Long)+170)
Stack frame 10-21 19:25:04.423   200   200 F DEBUG   :     #05 pc 00369f33  /data/app/com.adhamenaya-2/oat/arm/base.odex (offset 0x29c000) (void com.a
dhamenaya.MainActivity$2.run()+574)
Stack frame 10-21 19:25:04.424   200   200 F DEBUG   :     #06 pc 729298d1  /data/dalvik-cache/arm/system@framework@boot.oat (offset 0x1eb1000)

地点：grafty-hr-main.cpp:96

JNIEXPORT jbyteArray JNICALL Java_com_adhamenaya_Native_runGrafty(JNIEnv * env,
        jobject obj, jstring faceCascadeFile, jstring noseCascadeFile,
        jstring landmarks, jlong frame) {

    cv::Mat& inFrame = *(cv::Mat*) frame;


line 96 >>>>    gsys.setCurrentFrame(inFrame);

以及：

grafty-system-settings.cpp:39

void GraftySystem::setCurrentFrame(cv::Mat& inFrame) {
    cv::Size2d imgRes;
    float resRatio;
line 39 >>>>>   cv::Mat frame = inFrame.clone();

}

以及JNI函数的调用：

Java_com_adhamenaya_Native_runGrafty

是这样的：

private Mat mGray;

    public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
        mRgba = inputFrame.rgba();
        Imgproc.cvtColor(mRgba, mGray, Imgproc.COLOR_BGRA2GRAY);
        if (mRgba.empty())
            return null;
        else if (mRgba.channels() > 1)
            Imgproc.cvtColor(mRgba, mGray, Imgproc.COLOR_BGRA2GRAY);
        else
            mGray = mRgba;

        return mRgba;
    }
...
...
result = Native.runGrafty(mFaceCascadeFile,
                        mNoseCascadeFile, mLandmarks,
                        mGray.getNativeObjAddr());

似乎是帧参数中的问题。你能帮我弄清楚是什么问题吗？

Answer 1

只管写

public Mat onCameraFrame(CvCameraViewFrame inputFrame) {
    mGray = inputFrame.gray()
    return inputFrame.rgba();
}

OpenCV为您处理转换。如果在onCameraFrame()回调中直接调用JNI代码会发生什么？